An interview is a(n) in which one-on-one or small group question-and-answer sessions are conducted.

secondary source
unreliable source
serious source
primary source

i believe the answer may be "serious source"

An interview is a(n) primary source in which one-on-one or small group question-and-answer sessions are conducted. Primary source is a source gathered first hand (and interviewing is one). No matter how subjective it might be of how you would want to differentiate if it is fact or opinion.

A primary source provides direct evidence about an event or person (firsthand records created by people who actually participated in or remembered an event and reported on the event and their reactions to it). Often primary sources reflect the individual viewpoint of a participant/observer.

c is a symbol. when bernice gets her hair cut, it is the authors way of showing the affects and demands of pier pressure and the over-all attitudes of people at the time.

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.